| Advanced Satellite For Cosmology And Astronomy | Academic & Science |
| Association of Student Conduct Administration | Academic & Science |
| Association for Student Conduct Administration | Academic & Science |
| Alberta Student Council Association | Academic & Science |
| After School Campus Academy | Academic & Science |
| Annenberg Student Communication Association | Academic & Science |
| Associate of The Institute of Company Accountants (1990-2003) | Accounts and Finance |
| Ameristar Casinos, Inc. | Business |
| American School Counselor Association | Business |
| American Society of Consulting Arborists | Business |
| Accredited Snow Contractors Association | Business |
| Arab Society of Certified Accountants | Certifications |
| Association for Student Conduct Administrators | Community |
| Amsterdam School for Cultural Analysis | Community |
| Anglia School Of Christian Arts | Community |
| Alabama Scholastic Competition Association | Community |
| Accumulating Saving and Credit Associations | Community |
| Alabama State Chiropractic Association | Community |
| American School Counseling Association | Community |
| Association for Science Cooperation in Asia | Community |
| Autism Spectrum Community Assessment | Community |
| Association of State Correctional Administrators | Community |
| anti Saccharomyces cerevisiae antibodies | General |
| Active Sky Cloud Art | General |
| Artillery Systems Cooperation Activities | General |
| Accreditation Scheme for Conformity Assessment | General |
| Arizona Sprint Car Association | General |
| Adult Survivors Of Childhood Abuse | General |
| Arkansas Scholastic Chess Association | General |
| Adult Survivors of Child Abuse | General |
| Administrative Simplification Compliance Act | Governmental |
| Alabama State Council on the Arts | Governmental |
| Australian Shepherd Club of America | Medical |
| Anti-Saccharomyces Cerevisiae Antibody | Medical |
| Ambulatory Surgery Center Association | Medical |
| Alt Startrek Creative All | Messaging |
| Advanced Spacecraft for Cosmology and Astrophysics | Physics Related |
| Australian Speech Communications Association | Regional |
| Australian Shepherd Club Of Americia | Regional |
| Australian Specialist Cheesemakers Association | Regional |
| Alaska State Council on the Arts | Regional |
| Advanced Satellite for Cosmology and Astrophysics | Space Science |
| American Swimming Coaches Association | Sports |
| American Safe Climbing Assoc | Sports |
| American Safe Climbing Association | Sports |
